Improvement in circular-saw mills



D. LANE.

5m provement in Circular-Saw Mills.

I No. 132,841.

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Patnted Nov. 5,1872

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UNITED STATES PATENT DENNIS LANE, OF MONTPELIER, VERMONT, ASSIGNOE TOLANE, PITKiN, AND BROOK, OF SAME PLACE.

IMPRQVEMENT IN CIRCULAR-SAW MILLS.

Specification forming part of Letters Patent No. 132,841., datedNovember 5, 1872.

To all whom it may concern:

Be it known that I, DENNIS LANE, of Montpelier, in the county ofWashington and State of Vermont, have invented a new and valuableImprovement in Circular-Saw Mills; and I do hereby declare thatthefollowing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the annexed drawingmaking a part of this specification, and to the letters and figures ofreference marked thereon.

Figure l of the drawing is a representation of a plan view of myinvention. Fig. 2 is a side view of my invention. Fig. 3- is an end viewof .my invention. Fig. 4is a detail view of my invention.

My invention has relation to saw-mills; and it consists in theconstruction and novel arrangement of, first, the devices for regulatingthe feed and gig of the log-carriage second, the devices for gaging thelog, all as hereinafter fully described.

Referring to the accompanying drawing, A designates the saw-framesupporting the sawshaft B, arranged transversely, and having itshearings in the boxes 0 0 To this shaft are attached the mainbelt-pulley D, the conepulley D and the grooved belt-pulley D Edesignates the pinion-shaft, holding the pinion E, through which motionis conveyed to the saw-carriage. Upon the inner end of this shaft isplaced a largesized belt-wheel, F, constructed with a projecting rim, F,the outer surface of which is grooved, and receives a belt connectingsaid wheel tothe pulley D while the inner surface is designed to engagewith a friction roller or pinion, D secured on the end of a shaft, d.The shaft 01 has its bearin gs in boxes 01 d formed on a yoke orbracket,

W, and holds on its outer end a cone-pulley, 01

coupled by means of a crossed belt, Z, to the pulley D. To the inner endof the yoke d is pivoted a cam-plate, e, which is also pivoted to arigid standard, 0 G designates a bent rocker, pivoted midway between itsends to a rigid post, 9. This rocker is armed, at a point directly overits bearing, with a grooved stud, g, which supports the free end of thecamplate 6, in the under part of which is formed a concave recess, 0 Thesurface of this concavity lies in contact with the grooved part of thestud g, the sides of which serve as guides to the cam-plate. The shankof said stud is adjustable vertically through a slot formed in the luge, and is secured in position by means of a nut, e the shank beingscrew-form or threaded to receive said nut. The rocker G is actuated bymeans of a handle, H, and when the end to which said handle is attachedis lowered the stud g raises the cam-plate, and with it the adjacent endof the yoke d. As the yoke supports the shaft d, the latter isnecessarily raised in the above-described operation, thereby bringingthe friction-roller into contact with the interior surface of the rim F.When the handle H is raised the movement of the devices connectedtherewith is reversed and the friction-roller relieved from contact withthe rim I. If, when the roller is brought into contact with the rim F,the shaft d is properly rotating, the wheel F, with its shaft andattached pinion, will be caused to turn in the right direction forfeeding or propelling forward the saw-carriage.

I represents a loose belt connecting the wheels D and F. During theforward movement of the carriage this belt has no operative function.But when the friction-roller is lowered, this belt is tightened by meansof an arm, '5, on the end of the rocker, holding an anti-frictionsleeve, '5, and communicates from the shaft B a reverse motion to thewheel F, thereby gigging or moving back the saw-carriage. In order toallow the yoke 01 and shaft d the necessary adjustment, the box 01* ispivoted between the arms h of a U-shaped plate or yoke, by means ofset-screws h, the ends of which enter recesses in the sides of said box.The tension of these screws maybe regulated at the will of the operator.supporting the shaft B are hung in a like man nor, 0 0 being,respectively, the yokes and setscrews. The purpose of having thesedevices applied to the shaft B is to enable the latter to be adjusted,or to adapt itself to inaccuracies or faults in the setting of the partsof the mill, and to compensate for strain caused by the weight of logsor from other circumstances. The board while being cut passes over thetop of the box 0 which is therefore constructed with a projection, 0 tohold said board. The outer portion of the log travels over a shaft,

The boxes 0 O K, arranged transversely at one end of the frame andsupported by the standards 75 70 formed on the ends of a bar, L. Theshaft K is graduated to regulate or gage the thickness of boards, and isprovided with an adjustable collar, L secured in position by aset-screw,

L and constructed with an L-shaped arm, L

between the outer end of which and the collar is journaled ananti-friction roller, M, against which the surface of the log is placed,and in contact with which it moves. Whenever a board is cut the log ismoved up against the roller M. The collar L is also provided with astud, m, projecting downward, and designed in connection with the rib mto prevent the arm L from falling over toward the saw. Near however,thearm L may be allowed to turn over out of the way when desired. The shapeof the latch n causes it to remain in the proper position when lowered,as its end rests on the cross-beam of the frame. The standards 6 g aresecured to an adjustable plate, Z.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In a saw-mil], the combination, with abeltpulley, F, having a flangedrim, F, with inner and outer bearin g-surfaces, of the gigging-shaft E,the saw-shaft and pulley D the shaft (7, roller D endless band I,adjustable yoke 61 and rocking lever Gr, arranged to bear in re versedirection upon either said yoke or said band, substantially asspecified.

2. The rocker G having the armi and stud g, in combination with theloose belt I, beltwheels 1) F, pivoted cam-plate e, yoke d shaft d, androller D substantially as specified.

3. The combination of graduated roller K, adjustable arm L roller M,stud m, rib m, standard 70 70 lug n, and latch 12, substantially asspecified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

DENNIS LANE.

YVitnesses:

lVlAHLON TAPLIN, CARROLL P. PITKIN.

